The phrase "afraid/scared of your own shadow" is a common idiom used to describe someone who is overly anxious or easily frightened. While there are several synonyms for this expression, some of the most popular include "timid," "nervous," "jittery," "anxious," "apprehensive," "worried," and "fearful." Other similar phrases that can be used to convey the same meaning include "spineless," "cowardly," and "faint-hearted." No matter which term is used, the underlying sentiment is clear: the person in question lacks confidence and is easily intimidated by their surroundings.